Stand by you

When Kate was 17 she was raped, unknowingly for her. The rapist took pictures of her.
Nudes.

Kate is a part of the avenger and has been for 3 years when a few pictures of her bloody and bruised get released to the public. It's not hard for people to identify her when she's a popular face amongst most people.

Kate - subsequently 'The purple hawk' aka the second Hawkeye - disappears for a couple weeks. Everyone knows what happened and her whole life is ruined. She'd put this whole thing behind her and she's gone and started new.
New friends.
New girlfriend.
Estranged from her family.

She was ready to move on and forget.
Now she's not sure she can. And all her friends know.

Yelena knows.